Start by mapping badges, facility rights, contractor credentials, and application entitlements to a single identity record. Then apply the same joiner-mover-leaver, certification, and revocation processes across both domains so access can be approved, reviewed, and removed consistently rather than through separate physical and digital evidence chains.
Why This Matters for Security Teams
One identity model matters because physical and digital access now fail in the same operational window: a contractor badge can open a facility, while the same person’s account can still reach email, SaaS, or admin consoles after offboarding. When those records are split, joiner-mover-leaver actions become inconsistent, and reviewers cannot tell whether a person, badge, or account is actually still active. NHI Management Group research in the Ultimate Guide to NHIs shows why unified lifecycle control is so important, and the broader control problem is reflected in the OWASP Non-Human Identity Top 10.
The practical issue is not just convenience. Separate identity stores create duplicate approvals, stale entitlements, and inconsistent revocation timing. That is how a terminated worker can lose facility access immediately but retain application access for days, or vice versa. The result is a gap in attribution, auditability, and enforcement that security teams often discover only after an incident or an audit exception has already exposed the mismatch.
How It Works in Practice
A unified identity model starts by treating the person or contractor as the primary identity record, then attaching both physical and digital entitlements to that record as governed attributes. The badge is no longer a separate trust island, and neither is the application account. Instead, the access system becomes a shared control plane for identity proofing, approvals, reviews, and revocation.
In practice, security teams should align these functions:
- Joiner workflows issue both facility rights and application access from the same approved identity event.
- Mover workflows update location, role, vendor status, and account scope together so privileges stay synchronized.
- Leaver workflows revoke badge access, VPN, SaaS, privileged roles, and shared secrets on the same timeline.
- Certification cycles review the full access graph, not separate lists maintained by HR, physical security, and IT.
- Revocation evidence is retained in one audit trail so investigators can prove when access ended and who approved it.
This is also where policy enforcement matters. Current guidance suggests the most reliable model is an identity graph with attribute-based rules, not two disconnected approval chains. For digital access, controls such as NIST Cybersecurity Framework 2.0 and NIST SP 800-53 Rev. 5 Security and Privacy Controls support centralized access governance, while the NHI lifecycle guidance in The State of Non-Human Identity Security underscores how often revocation and rotation fail when processes are fragmented. The same pattern applies to badge systems: if access decisions are not anchored to one source of truth, deprovisioning becomes a coordination problem instead of a control.
These controls tend to break down in federated enterprises where physical security, HR, contractors, and IT each own a different system of record because identity correlation becomes brittle at scale.
Common Variations and Edge Cases
Tighter convergence often increases operational overhead, requiring organisations to balance stronger revocation control against local exceptions, union rules, and site-specific safety requirements. That tradeoff is real, especially where physical access is managed by a landlord, a manufacturer, or a regulated lab that cannot accept a fully centralized workflow.
Best practice is evolving in a few common edge cases. Executive escorts, shared badges, emergency access, and third-party maintenance accounts often need exception handling, but exceptions should still map back to a named identity record and a time-bound approval. Temporary workers and vendors are another challenge because their physical access may be site-based while their digital access spans multiple business units. In those cases, the safest model is a time-limited identity with explicit expiry, not a loosely shared credential or an orphaned visitor badge.
Security teams should also be careful not to confuse “one identity model” with “one directory.” There is no universal standard for this yet, but the direction across identity governance, physical access, and NHI oversight is clear: one authoritative record, multiple governed entitlement types, and one revocation process. For deeper context on lifecycle and audit concerns, the NHIMG pages on Lifecycle Processes for Managing NHIs and Regulatory and Audit Perspectives are useful references.
In practice, the hardest failures appear when physical access is revoked on paper but the digital side remains active because no single owner is accountable for both systems.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
OWASP Non-Human Identity Top 10 and CSA MAESTRO address the attack and risk surface, while NIST CSF 2.0, NIST SP 800-63 and NIST Zero Trust (SP 800-207) set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| NIST CSF 2.0 | PR.AA-1 | Identity proofing and access control are central to unifying physical and digital access. |
| NIST SP 800-63 | IAL | Identity assurance underpins linking a person to both physical and digital access rights. |
| NIST Zero Trust (SP 800-207) | AC-4 | Zero Trust requires policy-based access decisions across all resource types. |
| OWASP Non-Human Identity Top 10 | NHI-08 | Unified lifecycle control helps prevent orphaned non-human and machine access. |
| CSA MAESTRO | GOV-2 | MAESTRO emphasizes governance of autonomous and delegated access relationships. |
Anchor both badge and account access to one identity lifecycle and verify entitlements continuously.
